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A note on the recent increase of Solar UV‐B radiation over northern middle latitudes
Author(s) -
Zerefos C. S.,
Bais A. F.,
Meleti C.,
Ziomas I. C.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01187
Subject(s) - irradiance , cloud cover , atmospheric sciences , zenith , environmental science , solar zenith angle , latitude , solar irradiance , ozone , meteorology , climatology , middle latitudes , geography , physics , remote sensing , optics , astronomy , geology , cloud computing , computer science , operating system
In this work we present the results from the analysis of regular solar UV‐B spectral measurements obtained at Thessaloniki (40°N) during a period of three years, from November 1990 through November 1993. The results presented here refer to both clear‐skies (cloudiness ≤3/8) as well as to all‐skies conditions, and to solar zenith angles of 63°±1°. These results support earlier findings of increased solar UV‐B irradiances, under all‐skies conditions, associated with observed ozone decline at the same period. The observed acceleration of the ozone decline‐of about 5% per year‐during the three‐year period resulted to increased solar UV irradiance levels at Thessaloniki by 12.3% per year at 305 nm and 2.7% per year at 325 nm. These figures are slightly modified under all‐skies conditions, and they are in agreement with findings reported independently by other scientists.